US6676629B2 - Tissue liquefaction and aspiration for dental treatment - Google Patents
Tissue liquefaction and aspiration for dental treatment Download PDFInfo
- Publication number
- US6676629B2 US6676629B2 US10/408,604 US40860403A US6676629B2 US 6676629 B2 US6676629 B2 US 6676629B2 US 40860403 A US40860403 A US 40860403A US 6676629 B2 US6676629 B2 US 6676629B2
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- United States
- Prior art keywords
- tissue
- fluid
- liquefied
- heated
- target tissue
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- Expired - Fee Related
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/77—Suction-irrigation systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/89—Suction aspects of liposuction
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00137—Details of operation mode
- A61B2017/00154—Details of operation mode pulsed
- A61B2017/00172—Pulse trains, bursts, intermittent continuous operation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
- A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
- A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
- A61B2018/00029—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids open
- A61B2018/00035—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids open with return means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B2018/044—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating the surgical action being effected by a circulating hot fluid
- A61B2018/046—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating the surgical action being effected by a circulating hot fluid in liquid form
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2210/00—Anatomical parts of the body
- A61M2210/06—Head
- A61M2210/0612—Eyes
Definitions
- the present invention is directed toward a method for liquefying target tissue within a body and more particularly, toward a method of heating a biocompatible fluid and presenting such to target tissue, thereby liquefying the target tissue and aspirating it while leaving non-target tissue intact.
- Prior thermal energy sources used in surgery have been “dry-heat” devices. Some examples are: thermal lasers, ultrasound, microwave, radio frequency, and electrosurgery devices. These dry-heat energy sources transfer heat from a surgical instrument to a tissue primarily by the heat transfer modalities of conduction and radiation. Thermal lasers, ultrasound, and microwave energy sources can liquefy tissue, but only at very high energy levels. If any of these dry-heat energy sources are placed in direct contact with target surgical tissue, there is no tissue differentiation. That is, healthy as well as unhealthy tissue will be liquefied. For example, collapsing cavitation bubbles in front of an ultrasound surgical instrument release a thermal energy of 13,000° F. per bubble.
- U.S. Pat. No. 4,924,863 discloses a method for removing artherosclerotic plaque from a patient by heating the plaque under pressure for a limited period of time. When the plaque is heated, it liquefies without causing immediate death of the underlying tissue. The liquefied plaque is then aspirated from the body through a catheter.
- the means used for heating the plaque is microwave or radio frequency energy. As discussed above, however, in an effort to control the level of energy being produced, all of the plaque may not liquefy.
- U.S. Pat. No. 5,540,679 discloses the use of a balloon catheter for heating tissue in a patient's body.
- a heating device is located within the balloon and is arranged for heating fluid inside the balloon.
- unwanted tissue such as a tumor or an enlarged prostate gland
- thermal conduction from the fluid through a wall of the balloon.
- the heat destroys the tissue which is eventually absorbed into the patient's body.
- This method uses conduction and as explained above, such a method creates such a high level of energy that there is no tissue differentiation. As a result, healthy tissue may be heated and ultimately destroyed.
- U.S. Pat. No. 4,886,491 discloses a method of liposuction using an ultrasonic probe.
- An ultrasonic probe tip is vibrated at a high frequency and a low amplitude. This method separates the fatty tissue and creates heat which melts some of the fatty tissue.
- a saline irrigating solution is applied to the area which emulsifies the melted fatty tissue. The emulsified solution is then aspirated. Again, because of the high thermal energy input into the system there is no differentiation of tissue into target and non-target tissue.
- the present invention is designed to overcome the deficiencies of the prior art discussed above. It is an object of this invention to provide a method for liquefying target tissue within a living body while leaving non-target tissue intact, and aspirating the liquefied tissue as it is liquefied.
- a method for liquefying target tissue within a human body includes heating a biocompatible fluid, presenting this fluid to the target tissue which liquefies the tissue, while leaving non-target tissue intact, and aspirating the liquefied tissue as soon as it is liquefied.
- the present invention discloses a novel energy source which allows for efficient, safe, minimally invasive, and cost-effective surgery for surgical procedures where the goal of the surgery is to remove unwanted tissue from the body, within a surgical tissue field.
- the present invention also allows for the differentiation of target tissue from non-target tissue.
- the surgical tissue field is defined as the actual anatomical landscape with which the surgeon is physically interacting.
- Surgical tissue fields are comprised of multiple homogeneous tissue groups. Each of these homogeneous tissue groups has its own melting point. With the present invention, the melting point of a particular tissue group or unwanted tissue is determined in order to liquefy the tissue and rid the patient of the same.
- FIGURE is an elevational view of a liquefaction and aspiration device of the present invention.
- FIGURE a liquefaction and aspiration device constructed in accordance with the principles of the present invention and designated generally as 10 .
- the liquefaction device 10 includes a hollow handpiece 12 with a first end 14 and a second end 16 .
- An elongated cannula 18 extends from the first end 14 of the handpiece 12 and terminates in a tip 20 .
- the tip 20 has three ports formed therethrough.
- Three lumens 22 , 24 , and 26 are positioned in the cannula. Each of the lumens has one end communicating with a corresponding port and an opposite end extending into the handpiece 12 .
- An irrigation tube 28 has one end thereof connected to the lumen 24 and an opposite end connected to a fluid source 30 .
- the fluid source is heated by a heating element (not shown) that can be located within or outside of the handpiece 12 .
- the heated fluid source 30 supplies heated fluid through the heated irrigation tube 28 and out of the tip 20 of the cannula 18 via the port associated with the lumen 24 .
- a preferred heated fluid is a saline solution.
- the saline solution is heated to a temperature between 98.6° F. and 250° F. This temperature defines the minimum threshold temperature of the liquid that is required to cause liquefaction of a specific substance when the heated liquid is presented to the specific substance.
- the heated fluid can be fed utilizing a pump mechanism or simply by the force of gravity.
- a cooled solution irrigation tube 32 has one end thereof connected to the lumen 26 and an opposite end connected to an irrigation supply source 34 .
- the irrigation supply source supplies fluid through the irrigation tube 32 and out of the tip 20 of the cannula via the port associated with the lumen 26 .
- the preferred irrigation solution is a saline solution.
- the irrigation supply source is preferably mounted above the handpiece 12 so that gravity continuously feeds the irrigation solution through the irrigation tube 32 and out of the tip 20 of the cannula 18 . It should be readily apparent, however, that a pump could also be used.
- This irrigation solution may be chilled pre-operatively or cooled intra-operatively.
- the preferred temperature for the cooled solution is believed to be approximately 40° F., although the optimal temperature will vary depending on the temperature of the heated solution and the configuration of the tip 20 . That is, the temperatures of the solutions will vary depending on the type of tissue being liquefied. Furthermore, the tip 20 is disposable and may vary in size and shape depending upon what area of the body is being treated.
- An aspiration tube 36 has one end connected to the lumen 22 and the opposite end connected to a vacuum source 37 .
- the vacuum source 37 causes the target tissue and the saline solution to be aspirated from the surgical tissue field through the tip 20 of the cannula via the port associated with the lumen 24 . It should be noted that all of the above operations are preferably controlled through a controller circuit 38 .
- a cooled solution is fed through the irrigation tube 32 , through the lumen 26 and out the corresponding port in the tip 20 of the cannula 18 .
- the flow from the irrigation source 34 is controlled by the surgeon in a manner well known in the art (e.g., a foot actuated flow control switch).
- the tip 20 of the cannula 18 is inserted into the surgical tissue field. Heated saline solution is fed through the tube 28 , through the lumen 24 , and out of the tip 20 .
- the solution should be heated to the melting point of the target tissue.
- the target tissue Upon contact with the heated solution, the target tissue rapidly liquefies.
- the natural melting point of the target tissue may be taken advantage of to achieve selective liquefaction. It is because the total thermal energy input into the system is so low and because the thermal energy is liquid and in motion that selective liquefaction is achieved.
- most target surgical tissue has a lower melting point than non-target tissue because the non-target (or non-pathologic) tissue has greater structural integrity than target (or pathologic tissue).
- the liquefied tissue and solution are aspirated through the lumen 22 and through the aspirating tube 36 when the vacuum source 37 is activated in a manner well known in the art, such as through the use of a foot pedal.
- the aspiration and irrigation take place simultaneously.
- the aspiration takes place substantially throughout the procedure. That is, it is believed that it is neither necessary nor desirable to liquefy the entire target tissue before aspirating the same. Rather, as a portion of the target tissue is liquefied by the heated solution, it is irrigated by the cooled solution and aspirated. This process continues until the entire target tissue has been liquefied and aspirated. In some systems, however, irrigation is not necessary and the liquefied tissue may be aspirated without irrigation.
- the present method applies an energy source to the target tissue in order to liquefy the same.
- the present method differs from prior art methods in that the energy source in the present method is “wet-heat.” That is, it uses the heat transfer modality of convection primarily rather than the heat transfer modalities of conduction and radiation.
- the present method uses a surgical device, such as a catheter or a handpiece as described above, through which solution is ejected under a minimal degree of pressure.
- the solution has to be “in motion” because the target tissue is liquefied by the heat transfer principle of convection. In this manner the target tissue, which may be fatty tissue, is liquefied and aspirated.
- liquefaction also refers to “gelifaction” or “gelifying.” That is, the “liquid” may be part liquid, part gel, or part vapor, as long as that liquid is of such a state of matter that can be aspirated with low pressure suction/aspiration technology.
- a “solid,” on the other hand, is a state of matter that cannot be aspirated with the present low pressure suction/aspiration technology.
- aspiration refers to the technology of low pressure suction/aspiration, such as the procedure used in irrigation/aspiration procedures in cataract extraction. However, this does not eliminate the possibility of using higher pressure aspiration systems in some selected surgical sites.
- the present method may also be used in such areas as prostatectomy, vascular atherectomy/thrombectomy, and tumor removal.
- the target tissue may be subcutaneous fat, atheromatous plaque, or a uterine fibroid.
- the tip may be any size and shape in order to accommodate the area of the body being treated.
- the tip, cannula, and tubes may be replaced in order to re-use the device.
- Chemically active facilitators may be added to the liquid that is to be heated in order to achieve additional efficaciousness of liquefaction.
- fibrinolysin and EDTA may be used to liquify a fibrin-rich, calcium-rich atheromatous plaque.
- a cytotoxic chemical agent may be added to the liquid in order to remove a tumor.
- the apparatus of the present invention may also be used for dental procedures.
- the cannula is connected to a source of heated fluid where the fluid may be a continuous flow or pulsed so that heated fluid is repeatedly expressed from the tip of the cannula.
- the cannula is directed through an opening formed in the crown of the tooth.
- the heated fluid is directed at the pulp, nerve, and vascular tissue within the interior chamber of the tooth.
- the fluid may be saline, disinfectant, an antibiotic, abrasive solutions, or the like.
- other chemicals may be added to the fluid.
- the interior tissue of the tooth is liquefied and aspirated as discussed above. Additional application of heated fluid may be delivered to kill any residual bacteria or other microorganisms and then aspirated.
- the tooth may be packed with filler material typically used in such a procedure.
- the opening in the top of the tooth is filled or provided with a crown. Additional dental uses may include caries removal, plaque removal, calculus removal, soft tissue surgery, and teeth whitening.
- the bolus size per pulse was 0.27 ml.
- Room temperature tap water was poured into the water pik well. The temperature was measured at 80° F.
- the tip of the water pik was placed directly on the first fat cube and the water pik was turned on.
- the pulsating water was exposed to the fat cube for approximately one minute. There was no discernible effect.
- the same procedure was carried out on the second fat cube. Again, there was no discernible effect.
- the two fat cubes in the experimental group were then subjected to the same procedure as the control group with the exception that the water pik well was now filled with 120° F. tap water. Again, the water pik was turned on with the tip in the same place and was allowed to run for about one minute. In the first cube there was a tremendous effect. A 95% reduction in the mass of the cube was observed. There was no obvious effect on either the muscle tissue or on the blood vessel. There was a whitish fat liquid left in the tray. This liquid fat did not re-solidify and it readily poured out of the tray. The second fat cube was subjected to the same procedure, with the same result.
- the invention has been described in connection with the concept of liquefacation, it is not limited thereto.
- the invention can also be used for “cellular stripping.” This is accomplished by utilizing the moving heated bicompatible fluid to “strip” off cells that are clinging to a wall.
- it would include the concept of the stripping of bacterial cells that are clinging to the inside bony wall of the dental root. This would allow for the complete removal of any residual bacterial cells that would be lingering around after the main necrotic tissue was liquefied and aspirated from the root.
- the stripped cells are not subjected to liquefaction as described above. Rather, they are simply stripped from their attachment to a wall, and then aspirated from the site by aspirating the resultant liquid “slurry” comprised of saline, or other liquid, and bacterial cells dispersed within this liquid medium.
Abstract
Description
Claims (8)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/408,604 US6676629B2 (en) | 1995-02-06 | 2003-04-07 | Tissue liquefaction and aspiration for dental treatment |
US10/752,798 US7011644B1 (en) | 1995-02-06 | 2004-01-07 | Tissue liquefaction and aspiration for dental treatment |
US12/030,694 USRE43617E1 (en) | 1995-02-06 | 2008-02-13 | Tissue liquefaction and aspiration |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/384,655 US5616120A (en) | 1995-02-06 | 1995-02-06 | Method and apparatus for lenticular liquefaction and aspiration |
US08/823,713 US6074358A (en) | 1995-02-06 | 1997-03-25 | Method and apparatus for lenticular liquefaction and aspiration |
US09/030,792 US6544211B1 (en) | 1995-02-06 | 1998-02-26 | Tissue liquefaction and aspiration |
US10/408,604 US6676629B2 (en) | 1995-02-06 | 2003-04-07 | Tissue liquefaction and aspiration for dental treatment |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/030,792 Continuation-In-Part US6544211B1 (en) | 1995-02-06 | 1998-02-26 | Tissue liquefaction and aspiration |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/752,798 Continuation-In-Part US7011644B1 (en) | 1995-02-06 | 2004-01-07 | Tissue liquefaction and aspiration for dental treatment |
Publications (2)
Publication Number | Publication Date |
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US20030191429A1 US20030191429A1 (en) | 2003-10-09 |
US6676629B2 true US6676629B2 (en) | 2004-01-13 |
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Application Number | Title | Priority Date | Filing Date |
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US10/408,604 Expired - Fee Related US6676629B2 (en) | 1995-02-06 | 2003-04-07 | Tissue liquefaction and aspiration for dental treatment |
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Cited By (66)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7011644B1 (en) | 1995-02-06 | 2006-03-14 | Andrew Mark S | Tissue liquefaction and aspiration for dental treatment |
US20060135955A1 (en) * | 2003-01-18 | 2006-06-22 | Shadduck John H | Medical instrument and method of use |
US20060175244A1 (en) * | 2005-02-07 | 2006-08-10 | Hanuman Llc | Apparatus and method for preparing platelet rich plasma and concentrates thereof |
US20060224154A1 (en) * | 2001-12-07 | 2006-10-05 | Shadduck John H | Medical instrument and method of use |
US20060257819A1 (en) * | 2005-05-16 | 2006-11-16 | Johnson Douglas B | Endodontic procedure employing simultaneous liquefaction and acoustic debridgement |
US20060264896A1 (en) * | 2005-05-09 | 2006-11-23 | Palmer Erika I | Minimally invasive apparatus and method for treatment of a tumor associated with a bone |
US20060273049A1 (en) * | 2002-05-24 | 2006-12-07 | Leach Michael D | Method and apparatus for separating and concentrating a component from a multi-component material including macroparticles |
US20060273050A1 (en) * | 2002-05-24 | 2006-12-07 | Higgins Joel C | Apparatus and method for separating and concentrating fluids containing multiple components |
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US20070238072A1 (en) * | 2002-01-23 | 2007-10-11 | Mahmoud Torabinejad | Methods for disenfecting and removing smear layer from tooth surfaces |
US20080011684A1 (en) * | 2005-02-07 | 2008-01-17 | Dorian Randel E | Apparatus and method for preparing platelet rich plasma and concentrates thereof |
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US20080217265A1 (en) * | 2002-05-24 | 2008-09-11 | Biomet Manufacturing Corp. | Apparatus And Method for Separating And Concentrating Fluids Containing Multiple Components |
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